Assembly Instructions: Welder Series Kit WS14340 - Mustang II Crossmember
 
These instructions are applicable to WS14340, WS14440, and WS14540 Mustang II kits. The only difference in these kits is the nominal track width: WS14340 is 56”, WS14440 is 58”, and WS14540 is 60”. The width of the crossmembers is 30” for WS14340, 32” for WS14440, and 34” for WS14540. Upper towers are the same for all 3 kits.
 
These kits are designed to lower a frame.  Additional work might be required to keep a frame at the stock ride height.
 
WELDER SERIES PARTS ARE TO BE ASSEMBLED AND INSTALLED BY QUALIFIED WELDERS. THE PURCHASER OF WELDER SERIES’ PARTS MUST ESTABLISH THE QUALIFICATIONS OF THE PERSON WELDING THE PARTS. WELDER SERIES PARTS, WELDED IMPROPERLY, COULD FAIL AND CAUSE INJURY OR DEATH.
 
These instruction sheets are for the assembly of the crossmember and upper towers. Separate instruction sheets detail installation of the crossmember and towers in a frame.
 
In these instructions, reference is made to parts for the WS14340 kit. The other kits are assembled in the same way. Use the photos to identify the parts.
 

This plate, #14375, develops into the rear, top and rack mount portions of the
crossmember. The laser-cut slits allow the plate to be folded accurately.
 

This plate, #14373, develops into the front and bottom of the crossmember.
The laser-cut slits allow the plate to be folded accurately.
 

Clamp plate #14375 to the edge of a work bench as shown in the photo.
The slotted rack mount hole must be on your left as you face the plate, as shown in the photo.
The laser cut slit should be off of the bench slightly.
 

Use 2 hands to bend the top portion of the crossmember DOWN, as shown.
 

The top must be square to the back.
 

The front and bottom plate, #14373, is symmetrical and can be placed on the
bench with either side up. Bend down so the bottom is square to the front.
 

The crossmember plates will nest together and the tabs will provide close alignment, left to right. Check again that the parts are square and adjust, if necessary.
 

Split the gap between the tabs, tack, and weld all 4 corners.
Weld inside the crossmember at the ends.
 

Use an adjustable wrench, tightened on the plate, to bend the
rack mount sides (gussets) square to the rack mount face.
Then bend the rack mount face and gussets to the crossmember.
(see next two photos also)
 
 
 

Clamp the rack mount to the crossmember face.
 

Weld the gussets to the crossmember. Weld the corner edges that were opened
up by bending the laser cut slits. The notch in the driver’s side rack mount is
clearance for a power rack. Later model power racks require a 5/8” spacer
between the mount face and the rubber insulator.
 

The finished crossmember.
 

To assemble the upper towers, put 1/2" spacers under the top tower plate.
Place one shock mount/spring locator cup into the hole and onto the bench.
 

Weld the cup to the plate.
 

The alignment tabs on the top tower plate and on the wrap-around plates
will hold the parts in position. The tabs don't touch each other
- they just keep the parts "corner-to-corner" for welding.
 

Clamp the sides of the wrap-around plate and tack, as shown.
Finish welding the wrap-around plate to the top tower plate.
The corner-to-corner edge gives a safe, clean weld.

Now you can do the same thing to the other tower assembly.


If you have any problems with these instructions, please call us first.
We want to help you enjoy your project.
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